longmeadow - kane county, illinoiskdot.countyofkane.org/longmeadow parkway/ve...powerpoint...
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LONGMEADOW PARKWAY VALUE ENGINEERING STUDY
Value Engineering Evaluates engineering in regards to function of a product or service Generates alternatives through the use of creative thinking Is conducted between Phase I and Phase II Results in cost savings and better value
VE Summary
VE Workshop Idea generation - 126 Concepts reviewed & developed further Ideas Moving forward - 23
VE
workshop
Comments by KDOT and Phase II
Designers
Comments by IDOT
Final Decisions
Purpose To ensure best value for the project Projects over $50 million
Phase I Engineering primary areas of potential savings: Structure over Fox River Pavement Design Earthwork Drainage Design
VE Summary (cont.)
- Phase I Engineering Estimates
Reconfigure Span & Superstructure Phase I Design: 8-span structural steel
Evaluated 5 Alternate Designs
4-span over Fox River
High Performance Concrete (HPC) / High Friction Deck / Anti-icing deck
Two bridges separated by 150’ MSE Wall
4-lanes
Weathering Steel Phase I Design: Painted steel girders
Eliminates initial paint cost
Reduces life cycle cost - no re-painting
Blends into environment
Weathering Steel: stable material that gives a rustic appearance when exposed to weathering elements
Open Pier Type Phase I Design: Solid wall piers
Open pier, multi-column, hammerhead configuration
Reduces cost of material and maintenance
More aesthetically pleasing
Four Foot Wide Raised Median on Bridge Phase I Design: Eight foot wide raised median
Reduce median width by four feet
Decreases width of entire bridge
Decreases bridge cost
Bridge Profile Adjustment Phase I Design: Large cuts thru bluffs on east and west of Fox River
Evaluate profile alternatives to minimize cuts
Significantly reduces earthwork cut
11 Foot Wide Lanes Phase I Design: 12 foot wide lanes
11 foot lanes on Longmeadow and side roads
Reduce overall cross section
Reduce pavement and earthwork costs
4 lanes – Randall to IL62
Grade Separation at IL 31 Phase I Design: Conventional at-grade
Improve intersection capacity
Better earthwork balance
Improve drainage function
Avoid historic property
Earth Excavation Phase I Design: Not directly addressed
Raging Buffalo Snowboard/Ski Park
KDOT and KCFP mutual benefit
Reduces haul-off expenses
Reduces truck traffic on IL 31
Open Ditch Drainage Convert a portion of closed drainage
to open ditch
Retain curb and gutter to collect water and outlet directly into ditch
Eliminates an estimated 8,000 LF of storm sewer
Earth Berms Use excess fill for berms where able
Reduces haul-off costs
Separates road from adjacent properties
Cost Breakdown
Section A – Huntley/Boyer Road through Randall Road
$11 Million
Section B – Randall Road through Illinois Route 31
$29 Million
Section C – Illinois Route 31 through Illinois Route 25
$48 Million
Section D – Illinois Route 25 through Illinois Route 62
$9 Million
Questions
LONGMEADOW PARKWAY VE STUDY